Answer
$\Delta \theta=47\ rad$
Work Step by Step
We know that
$\Delta \theta=\frac{1}{2}(\omega_i+\omega_f)t$
We plug in the known values to obtain:
$\Delta \theta=\frac{1}{2}(11+28)(2.4)$
$\Delta \theta=47\ rad$
Physics Technology Update (4th Edition)
by Walker, James S.
Published by
Pearson
ISBN 10:
0-32190-308-0
ISBN 13:
978-0-32190-308-2
Chapter 10 - Rotational Kinematics and Energy - Problems and Conceptual Exercises - Page 324: 17
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